No dataset here is invented, scraped from a paywall, or purchased from a data broker. Every row below links to the real, live, public source it was fetched from — and this repo's own data/*-methodology.md files (linked per row) go further: real coverage numbers, known gaps, and exactly what each layer's 0–100 score does and doesn't mean.
Every dataset's real source
- Allergy severityAllergy Locator's own validated grass model (plus Köppen-zone climate modeling for 28 more allergens) — methodology
- CrimeFBI Crime Data Explorer — methodology
- Care accessCurated hospital facility lists (ported from Allergy Locator) — methodology
- Natural hazard riskFEMA National Risk Index — methodology
- Social vulnerabilityCDC/ATSDR Social Vulnerability Index — methodology
- Health outcomesCDC PLACES — methodology
- Food accessUSDA ERS Food Access Research Atlas — methodology
- Housing supplyZillow Research Data — methodology
- Housing market speedZillow Research Data — methodology
- Traffic safetyCounty Health Rankings & Roadmaps — methodology
- Transit accessFTA National Transit Database — methodology
- WalkabilityEPA National Walkability Index — methodology
- Park accessTrust for Public Land ParkServe — methodology
- Electoral competitivenessMIT Election Data + Science Lab — methodology
- Broadband accessCounty Health Rankings (Census ACS republication) — methodology
- Median household incomeCounty Health Rankings (Census ACS republication) — methodology
- Housing affordabilityCounty Health Rankings (Census ACS republication) — methodology
- Extreme heatNOAA NCEI Climate Normals — methodology
- Sales taxTax Foundation — methodology
- Measured grass pollen (real, limited coverage)Vermont Dept. of Health EPHT Pollen (ArcGIS FeatureServer) — methodology
- State income taxTax Foundation — methodology
- Property taxCensus ACS 5-year estimates — methodology
- UnemploymentBLS Local Area Unemployment Statistics — methodology
- Air qualityEPA Air Quality System — methodology
- Population changeCensus PEP + ACS (stitched across 3 real vintages) — methodology
- Cost of livingBEA Regional Price Parities — methodology
- School spendingUrban Institute Education Data Portal (NCES CCD) — methodology
- Business densityCensus Business Patterns — methodology
- Industrial facility densityEPA Toxics Release Inventory — methodology
- Average wageCensus Business Patterns — methodology
- Drought severityUS Drought Monitor (NOAA/USDA/UNL) — methodology
- Hate crime rateFBI Crime Data Explorer — methodology
- Superfund site densityEPA Envirofacts (SEMS) — methodology
- Seismic riskUSGS ASCE 7-22 Web Service — methodology
- Library accessIMLS Public Libraries Survey — methodology
- Severe weather frequencyNOAA Storm Events Database — methodology
- Gigabit availabilityFCC National Broadband Map — methodology
- Historic site accessNPS National Register of Historic Places — methodology
- Environmental violationsEPA ECHO — methodology
- Winter cold burdenNOAA NCEI Climate Normals — methodology
- Electricity costEIA (Energy Information Administration) API — methodology